:root {
  --bg: #f5f0e8;
  --panel: rgba(255, 252, 245, 0.82);
  --panel-strong: rgba(255, 250, 240, 0.97);
  --text: #2c2416;
  --muted: #7a6a52;
  --accent: #b5651d;
  --accent-2: #8b5cf6;
  --accent-hover: #8b4513;
  --border: rgba(90, 60, 20, 0.18);
  --input-bg: rgba(255, 248, 235, 0.7);
  --glow-opacity: 0.25;
}

[data-theme="dark"] {
  --bg: #1a1208;
  --panel: rgba(30, 20, 8, 0.82);
  --panel-strong: rgba(35, 24, 10, 0.97);
  --text: #f5ead8;
  --muted: #c4a97a;
  --accent: #e8a060;
  --accent-2: #a78bfa;
  --accent-hover: #f0b880;
  --border: rgba(220, 180, 120, 0.18);
  --input-bg: rgba(40, 28, 10, 0.7);
  --glow-opacity: 0.35;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Roboto', sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(181, 101, 29, var(--glow-opacity)), transparent 28%),
    radial-gradient(circle at bottom right, rgba(139, 92, 246, var(--glow-opacity)), transparent 32%),
    var(--bg);
  min-height: 100vh;
  letter-spacing: 0.03em;
  line-height: 1.7;
  overflow-x: hidden;
  transition: background 0.3s ease, color 0.3s ease;
}

body, a {
  text-decoration: none;
}

.background-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.45;
  pointer-events: none;
  z-index: 0;
}

.glow-one {
  width: 280px;
  height: 280px;
  background: var(--accent);
  top: -60px;
  left: -60px;
  opacity: var(--glow-opacity);
}

.glow-two {
  width: 320px;
  height: 320px;
  background: var(--accent-2);
  bottom: -80px;
  right: -90px;
  opacity: var(--glow-opacity);
}

.page-shell {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 2rem;
  animation: pageFadeIn 0.35s ease both;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
  padding: 2rem;
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 28px;
  backdrop-filter: blur(18px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
}

.eyebrow {
  margin: 0 0 0.7rem;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.25em;
}

h1 {
  margin: 0;
  font-size: clamp(2.3rem, 4.4vw, 3.7rem);
  font-weight: 900;
  line-height: 1.1;
}

h2 {
  margin: 0.4rem 0 0;
  font-size: clamp(1.2rem, 2.2vw, 1.65rem);
  color: var(--muted);
  font-weight: 400;
}

.hero-text {
  margin: 1.1rem 0 0;
  max-width: 620px;
  color: var(--muted);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.4rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.2rem;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 12px 28px rgba(181, 101, 29, 0.25);
}

.button.primary:hover {
  background: linear-gradient(135deg, var(--accent-hover), var(--accent-2));
}

.button.secondary {
  color: var(--text);
  border: 1px solid var(--border);
  background: var(--input-bg);
}

.hero-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.hero-visual img {
  width: min(100%, 320px);
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 24px;
  border: 1px solid var(--border);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.35);
}

.status-card {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  width: min(100%, 320px);
  padding: 0.8rem 1rem;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.95rem;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 10px #22c55e;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
  margin-top: 1.2rem;
}

.info-grid .panel ul.capabilities {
  list-style: disc;
  grid-template-columns: 1fr;
}

.panel {
  padding: 1.4rem;
  border: 1px solid var(--border);
  background: var(--panel-strong);
  border-radius: 22px;
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.22);
}

.panel h3 {
  margin-top: 0;
  margin-bottom: 0.7rem;
  font-size: 1.2rem;
}

.panel p,
.panel li {
  color: var(--muted);
}

.capabilities {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
  padding-left: 1rem;
  margin: 0;
}

.social-panel {
  margin-top: 1.2rem;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.social-links a {
  color: var(--accent);
  font-weight: 600;
}

.social-links a:hover {
  color: var(--accent-hover);
}

/* ── Nav ── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 1.5rem;
  background: var(--panel-strong);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px);
}

.nav-brand {
  font-weight: 900;
  font-size: 1.1rem;
  color: var(--text);
  letter-spacing: 0.04em;
}

.nav-links {
  display: flex;
  gap: 0.3rem;
  align-items: center;
}

.nav-links a {
  color: var(--muted);
  font-weight: 500;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  transition: color 0.2s, background 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background: var(--input-bg);
}

.theme-toggle {
  background: var(--input-bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.3s ease, border-color 0.3s ease;
  line-height: 1;
}

.theme-toggle:hover {
  border-color: var(--accent);
}

/* ── Page transition ── */
.page-shell {
  animation: pageFadeIn 0.35s ease both;
}

@keyframes pageFadeIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

body.page-exit .page-shell {
  animation: pageFadeOut 0.25s ease both;
}

@keyframes pageFadeOut {
  to { opacity: 0; transform: translateY(-10px); }
}

/* ── Flashcards ── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.4rem;
  margin-top: 1.4rem;
}

.card-wrap {
  perspective: 1000px;
  height: 280px;
  cursor: pointer;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.55s cubic-bezier(0.4, 0.2, 0.2, 1);
}

.card-wrap.flipped .card-inner {
  transform: rotateY(180deg);
}

.card-front,
.card-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 22px;
  border: 1px solid var(--border);
  background: var(--panel-strong);
  box-shadow: 0 14px 36px rgba(0,0,0,0.15);
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}

.card-back {
  transform: rotateY(180deg);
  justify-content: flex-start;
  overflow-y: auto;
}

.card-front .card-icon {
  font-size: 2.2rem;
  margin-bottom: 0.6rem;
}

.card-front h3 {
  margin: 0 0 0.4rem;
  font-size: 1.25rem;
}

.card-front p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.card-hint {
  margin-top: auto;
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.card-back h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  flex-shrink: 0;
}

.card-back p {
  color: var(--muted);
  font-size: 0.88rem;
  margin: 0 0 0.6rem;
  line-height: 1.55;
  flex-shrink: 0;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  flex-shrink: 0;
}

.tag {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  color: var(--accent);
}

.projects-intro {
  color: var(--muted);
  margin: 0.3rem 0 0;
  font-size: 0.95rem;
}

.contact-input {
  width: 100%;
  padding: 0.6rem;
  margin: 0.4rem 0;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s ease;
}

.contact-input:focus {
  outline: none;
  border-color: var(--accent);
}

.footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 1rem 0 2rem;
  color: var(--muted);
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 1rem, 1120px);
    padding-top: 1rem;
  }

  .hero,
  .panel {
    padding: 1.1rem;
    border-radius: 18px;
  }

  .info-grid {
    grid-template-columns: 1fr;
  }

  .capabilities {
    grid-template-columns: 1fr;
  }

  .status-card {
    border-radius: 16px;
  }
}